INDEX 



Aaronsohn, 252, 25.3. 



Absorption, explained, 166-170; 

 selective, 170 ; of water by seeds, 

 210. 



Africa, present status of dry-farm- 

 ing in, 393. 



Air, see also Soil-air; composi- 

 tion, 172, 209; moisture in, 46, 

 103, 133, 134. 



Alberta, deep and fall plowing in, 

 195 ; fallowing in, 197. 



Alcohol, engines for pumping, 342. 



Alfalfa, see Lucern. 



Algeria, durum wheat in, 237. 



Alkali, furthers evaporation, 149 ; 

 soils, 66 ; and native vegetation, 

 80 ; effect on absorption, 168. 



Alumina, in soils, 70. 



Alway, 95 ; on Saskatchewan, 407. 



Alway and Trumbull, 285. 



American Indian, dry-farmers, 353. 



Antiquity, great nations of antiquity 

 in arid countries, 351. 



Apples, on dry-farm, 252. 



Area, dry-farm areas, 22, 27 ; dry- 

 farm for one man, 301. 



Arid, defined, 24. 



" Arid-farming," 4. 



Arid region, defined by evapora- 

 tion, 131. 



Aridity, civilization and, 351 ; 

 determined by rainfall, 25. 



Arizona, area, 26 ; type of rainfall, 

 39 ; soils, 76 ; evaporation in, 

 132 ; pumping in, 344 ; eco- 

 nomical use of water, 348 ; mes- 

 quite tree, 251, 305; olive or- 

 chards, 252 ; milo, 246 ; cacti, 

 305 ; present status of dry-farm- 

 ing, 388. 



429 



Arizona Station, dry-farming, 369. 



Ash, in plants, 264, 281. 



Assimilation, of carbon, 171. 



Atkinson, 120, 190, 202. 



Atmosphere, see air. 



Auger, for judging soils, 78. 



Aughey, 90. 



Australia, dry-farm area, 33 ; fal- 

 lowing in, 197 ; present status 

 of dry-farming, 393. 



Azotobacter, in dry-farming, 291. 



Bacteria, and lime, 70 ; and soil- 

 fertility, 290. 



Bailey, 74. 



Ball, 245. 



Barley, 241 ; pounds water for one 

 pound, 14, 15; depth of roots, 

 88 ; amount to sow, 224 ; water 

 absorbed by seeds of, 209 ; 

 repeated drying in germination, 

 218 ; variations in composition, 

 271. 



Barnes Farm., record of, 403. 



Basis, theoretical basis of dry-farm- 

 ing, 11. 



Bean, field, 250 ; for nitrogen, 297 ; 

 water absorbed by seeds of the, 

 209. 



Bear River City, first large dry- 

 farming trial at, 355. 



Bibliography, of dry-farming, 

 424. 



Black walnut, on dry-farms. 



Blowing, of soils in Great 

 198. 



Blue Stem, wheat, 237, 240. 



Bogdanoff, 210. 



Bonneville, Lake, 75, 386. 



Bos\oell oats, 241. 



417- 



253. 

 Plains, 



